iska gudun gaugeKa'idarsa ta asali ita ce sanya waya mai ƙarfi a cikin ruwa, ta hanyar dumama halin yanzuWire ƙarfe，Yana sa zafin jiki ya fi zafin jiki na ruwa, don haka an kira mitar iska ta wayar ƙarfe "layin zafi". Lokacin da ruwa ya gudana ta hanyar wayar karfe a tsaye, wani ɓangare na zafi na wayar karfe zai kawar da shi don saukar da zafin jiki na wayar karfe. Dangane da tilasta convectionHeat musayarKa'idar cewa akwai dangantaka tsakanin zafi Q da saurin ruwa v wanda zai iya fitar da layin zafi. A misali zafi line bincike ya ƙunshi biyu brackets tange wani gajeren da kuma m waya. Wire yawanci amfaniplatinum、Rhodium、Tungstenda dai sauran narkewa point high,延展性Good karfe da aka yi. Yawancin amfani da waya diamita ne 5μm da tsawon 2 mm; karamin bincike diamita ne kawai 1μm da tsawon 0.2 mm.yana da ukuBabban Features：